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1·A whale is a kind of mammal.

鲸是一种哺乳动物。《新英汉大辞典》

2·Bats is the only mammal that can fly.

蝙蝠是唯一能飞的哺乳动物。

3·The whale is a mammal.

鲸鱼是哺乳动物。

4·It is the least protected mammal species.

它是最不受保护的哺乳动物。

5·About 35 percent of mammal species were lost.

大约35%的哺乳动物物种消失了。

6·The camel is a mammal, but the kiwi is a bird.

骆驼是一种哺乳动物，但是几维鸟是一种鸟。

7·You won't ever find feathers on a mammal or gills on a primate.

你在哺乳动物身上找不到羽毛，在灵长类动物身上找不到腮。

8·Because fish look through water, their eyes are very different from a mammal.

因为鱼能透过水看东西，它们的眼睛与哺乳动物非常不同。

9·I mean, Ambulocetus is a mammal that shows a sort of bridge between walking on land and swimming.

我的意思是，陆行鲸是一种哺乳动物，可以指明一个路上行走动物和水中游泳动物的清晰联系。

10·The pronghorn, which resembles an antelope, though they are unrelated, is the fastest land mammal of the New World.

叉角羚与羚羊虽无亲缘关系，但却形似羚羊，它是新大陆速度最快的陆地哺乳动物。

哺乳动物

1·A whale is a kind of mammal.

鲸是一种哺乳动物。《新英汉大辞典》

2·Bats is the only mammal that can fly.

蝙蝠是唯一能飞的哺乳动物。

3·About 35 percent of mammal species were lost.

大约35%的哺乳动物物种消失了。

4·The camel is a mammal, but the kiwi is a bird.

骆驼是一种哺乳动物，但是几维鸟是一种鸟。

5·The pronghorn, which resembles an antelope, though they are unrelated, is the fastest land mammal of the New World.

叉角羚与羚羊虽无亲缘关系，但却形似羚羊，它是新大陆速度最快的陆地哺乳动物。

哺乳类动物

1·Indeed, not a single mammal species other than the Wolf was native to the Falkland Islands, located 300 miles off the southeastern tip of south America.

除了这种狼之外，实在没有一个单一的哺乳类动物物种是原产于福克兰群岛的，该群岛位于南美洲东南端300英里外。

2·That's like comparing a modern mammal to a dinosaur.

这就好比拿现代哺乳类动物和恐龙相比较一样。

3·Mammal a whale is not a fish, but a mammal.

鲸不是鱼，而是哺乳类动物。

4·Researchers recently estimated that the total mammal species count will rise from about 5, 500 now to 7, 500 by mid-century.

研究人员们最近估计，到本世纪中叶，哺乳类动物的物种数量将从目前的5500种上升至7500种。

5·A whale is the largest mammal in the world.

鲸鱼是世界上最大的哺乳类动物。

(1)marine mammal海产哺乳动物